High Resolution Numerical Weather Simulation for Orographic Precipitation as an Accurate Early Warning Tool for Landslide Vulnerable Terrains

Abstract

AbstractAccurate early warning for rain-induced landslides is still challenging due to regional and local variations of rainfall prediction due to low accuracy, and resolution. The “Multi-Scale Simulator for the Geoenvironment (MSSG)” system, developed by the Tokyo Institute of Technology, Japan Agency for Marine-Earth Science and Technology and Waseda University allows for high-resolution simulations and seamless modeling of weather and climate interactions, and employs advanced meteorological aspects.MSSG simulations compared with rainfall data recorded in the Aranayaka automated rain gauge for past events, including the devastating landslide in 2016. The simulations achieved satisfactory results in reproducing rainfall events. Higher-resolution simulations exhibited higher maximum rainfall intensity and cumulative rainfall accumulation. This study emphasizes the importance of considering finer scales in meteorological simulations to effectively capture the intricate variations associated with extreme rainfall events. This study places significant emphasis on the importance of considering finer scales in meteorological simulations in order to confirm the necessity of high resolutions to capture the temporal and spatial variations of orographic rainfall.